I know this is a very noobish question, but... Can i mine with a Dual Core 2.4ghz CPU laptop? I'm only using free bitcoin websites to earn bitcoins and then buy a good computer to invest in bitcoin mining. Also, sorry for my bad english, i'm brazilian hehe ._.
If what you mean is mining bitcoin it is not possible anymore the difficulty is so high and it;s impossible to do so but you can mine alt coins with a cpu but those are crypto note,I am also minin gwith my spare cpu using minergate and I am mining bytecoin and monero
minergate and other soft like this is useless, i tried to mine these altcoins too using my server and when i count, in one month i will get about 4 $. its just funny. forrget about mining with cpu
well it depend some tiem some good cpu coin emerge and you can have some profit
take "HODL" for example a recent altcoin only minable with cpu, and now it can be sold for at least 10k satoshi, and the block reward is 50, was easy to instamine a bunch of block, so easy profit there
Even then the cost of Electricity and maintenance is also high so if you calculated everything then i dont think you will get that much profit from mining, instead you can go for trading in bitcoin or alt coin.